const fs = require('fs');
const path = require('path');

const dir = __dirname;
const files = fs.readdirSync(dir).filter(f => f.endsWith('.html'));

const headInject = `\n  <!-- AOS CSS -->\n  <link href="https://unpkg.com/aos@2.3.1/dist/aos.css" rel="stylesheet">`;
const bodyInject = `\n  <!-- Global Preloader -->\n  <div id="global-preloader" class="preloader">\n    <div class="preloader-spinner"></div>\n  </div>`;
const scriptInject = `\n  <!-- AOS JS -->\n  <script src="https://unpkg.com/aos@2.3.1/dist/aos.js"></script>\n`;

files.forEach(file => {
    let content = fs.readFileSync(path.join(dir, file), 'utf8');
    let changed = false;

    if (!content.includes('aos.css')) {
        content = content.replace('</head>', headInject + '\n</head>');
        changed = true;
    }
    if (!content.includes('global-preloader')) {
        content = content.replace(/<body[^>]*>/, match => match + bodyInject);
        changed = true;
    }
    if (!content.includes('aos.js')) {
        content = content.replace('</body>', scriptInject + '</body>');
        changed = true;
    }

    if (changed) {
        fs.writeFileSync(path.join(dir, file), content, 'utf8');
        console.log(`Injected into ${file}`);
    }
});